Thickness Of Vapor Barrier For Attic

Plastic specifically 6 mil polyethylene plastic is.

Thickness of vapor barrier for attic.

There are two measurements you should be familiar with when choosing your poly for your crawlspace vapor barrier. The paper facing contains a layer of impermeable asphalt that prevents water vapor from passing through it. Choosing a crawlspace vapor barrier thickness. It s important to choose a company that is experienced in doing this type of work and has a track record of happy customers.

The insulation fiberglass or cellulose is then placed on top of the drywall with no vapor barrier above or below. If you d like more information about installing a vapor. Some debate still occurs over how necessary vapor barriers are but a consensus is growing closer. Most authorities now agree that vapor barriers are important under certain conditions but not necessarily as a whole house solution for every home.

Mils is the measurement of the poly s thickness and perms represent permeability to moisture. In circumstances where conditions inside a home or office are much different than outdoor conditions water. The thickness of your vapor barrier is just one of the many considerations you need to take into account when installing a crawl space encapsulation system. Attic vapor barrier detail for cold climates the best approach for a vented attic in a cold climate is installing a layer of drywall with a good coat of latex paint the paint creates a semi permeable vapor barrier.

What you need is an air barrier that is at every step of the way you have to pay attention to airtightness. Do not add a vapor barrier on top of the insulation in your attic since the paper facing on the existing insulation is the vapor barrier. When it comes to the stairway leading into your attic you should heed the advice in this article. Polyethylene sheeting is measured in mils a mil is equal to 0 001.

Some regions don t require a vapor barrier. Resolution of the vapor barrier debate. Whether using loose fill or batts put the vapor barrier closest to the warm side of your installation where hot moist air would get in facing the house s interior in cold climates beneath floor insulation and the attic s interior in hot climates on top of floor insulation. The basics of air sealing are covered in this article.

Air sealing an attic. No you don t need a vapor barrier. Without a vapor barrier in place condensation inside the walls could ruin the insulation and promote the growth of harmful mold and bacteria.